Class: Protractor

Inherits:
Object
  • Object
show all
Defined in:
lib/angular_webdriver/protractor/protractor.rb

Constant Summary collapse

NEW_FINDERS_KEYS = 
%i(
  binding
  exactBinding
  partialButtonText
  buttonText
  model
  options
  cssContainingText
  repeater
).freeze
NEW_FINDERS_HASH =
:binding
NEW_FINDERS_KEYS.map { |e| [e, e.to_s] }.to_h.freeze
ABOUT_BLANK =

Reset URL used on IE & Safari since they don’t work well with data URLs

'about:blank'.freeze
DEFAULT_RESET_URL =

Reset URL used by non-IE/Safari browsers

'data:text/html,<html></html>'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ Protractor

Creates a new protractor instance and dynamically patches the provided driver.

Parameters:

  • opts (Hash) (defaults to: {}) —

    the options to initialize with

Options Hash (opts):

  • :watir (Watir::Browser) —

    the watir instance used for automation

  • :root_element (String) —

    the root element on which to find Angular

  • :ignore_sync (Boolean) —

    if true, Protractor won’t auto sync the page



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 239

def initialize opts={}
  @watir = opts[:watir]

  valid_watir = defined?(Watir::Browser) && @watir.is_a?(Watir::Browser)
  raise "Driver must be a Watir::Browser not #{@driver.class}" unless valid_watir
  @driver = @watir.driver

  unless Selenium::WebDriver::SearchContext::FINDERS.keys.include?(NEW_FINDERS_KEYS)
    Selenium::WebDriver::SearchContext::FINDERS.merge!(NEW_FINDERS_HASH)
  end

  unless Watir::ElementLocator::WD_FINDERS.include? NEW_FINDERS_KEYS
    old = Watir::ElementLocator::WD_FINDERS
    # avoid const redefinition warning
    Watir::ElementLocator.send :remove_const, :WD_FINDERS
    Watir::ElementLocator.send :const_set, :WD_FINDERS, old + NEW_FINDERS_KEYS
  end

  @driver.protractor = self

  # The css selector for an element on which to find Angular. This is usually
  # 'body' but if your ng-app is on a subsection of the page it may be
  # a subelement.
  #
  # @return [String]
  #
  @root_element      = opts.fetch :root_element, 'body'

  # If true, Protractor will not attempt to synchronize with the page before
  # performing actions. This can be harmful because Protractor will not wait
  # until $timeouts and $http calls have been processed, which can cause
  # tests to become flaky. This should be used only when necessary, such as
  # when a page continuously polls an API using $timeout.
  #
  # @return [Boolean]
  #
  @ignore_sync       = !!opts.fetch(:ignore_sync, false)

  @client_side_scripts = ClientSideScripts

  browser_name = driver.capabilities[:browser_name].to_s.strip
  @reset_url   = reset_url_for_browser browser_name

  @base_url          = opts.fetch(:base_url, nil)

  # must be local var for use with define element below.
  protractor_element = AngularWebdriver::ProtractorElement.new @watir
  driver             = @driver

  # Top level element method to enable protractor syntax.
  # redefine element to point to the new protractor element instance.
  #
  # toplevel self enables by/element from within pry. rspec helpers enables
  # by/element within rspec tests when used with install_rspec_helpers.
  toplevel_main      = eval('self', TOPLEVEL_BINDING)
  [toplevel_main, AngularWebdriver::RSpecHelpers].each do |obj|
    # define singleton on toplevel main, otherwise use regular define method
    # if we use define singleton on the rspec helpers, then rspec won't
    # be able to handle block parameters.
    #
    # Also rspec requires config.include AngularWebdriver::RSpecHelpers
    # for the no_wait helper to accept the block parameter.
    method_type = obj == toplevel_main ? :define_singleton_method : :define_method

    obj.send method_type, :element do |*args|
      protractor_element.element *args
    end

    obj.send method_type, :by do
      AngularWebdriver::By
    end

    obj.send method_type, :no_wait do |&block|
      max_wait      = driver.max_wait_seconds
      max_page_wait = driver.max_page_wait_seconds

      driver.set_max_wait 0
      driver.set_max_page_wait 0

      begin
        raise ArgumentError, 'Tried to use no_wait without a block' unless block
        result = block.call
      ensure
        driver.set_max_wait max_wait
        driver.set_max_page_wait max_page_wait
      end

      result
    end
  end

  self
end

Instance Attribute Details

#base_url ⇒ String

File.join(base_url, destination) when using driver.get and protractor.get (if sync is on, base_url is set, and destination is not absolute).

Returns:

  • (String) —

    Default nil.



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 52

def base_url
  @base_url
end

#client_side_scripts ⇒ Object (readonly)

All scripts to be run on the client via executeAsyncScript or

executeScript should be put here.

NOTE: These scripts are transmitted over the wire as JavaScript text
constructed using their toString representation, and# cannot*
reference external variables.

Some implementations seem to have issues with // comments, so use star-style
inside scripts. that caused the switch to avoid the // comments.)



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 84

def client_side_scripts
  @client_side_scripts
end

#driver ⇒ Object (readonly)

The Selenium::WebDriver driver object



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 87

def driver
  @driver
end

#ignore_sync ⇒ Boolean

If true, Protractor will not attempt to synchronize with the page before performing actions. This can be harmful because Protractor will not wait until $timeouts and $http calls have been processed, which can cause tests to become flaky. This should be used only when necessary, such as when a page continuously polls an API using $timeout.

Returns:

  • (Boolean) 


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# File 'lib/angular_webdriver/protractor/protractor.rb', line 44

def ignore_sync
  @ignore_sync
end

#reset_url ⇒ Object (readonly)

URL to a blank page. Differs depending on the browser.

See Also:



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 92

def reset_url
  @reset_url
end

#root_element ⇒ String

The css selector for an element on which to find Angular. This is usually ‘body’ but if your ng-app is on a subsection of the page it may be a subelement.

Returns:

  • (String) 


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# File 'lib/angular_webdriver/protractor/protractor.rb', line 34

def root_element
  @root_element
end

Instance Method Details

#_js_comment(description) ⇒ Object

Ensure description is exactly one line that ends in a newline must use /* */ not // due to some browsers having problems with // comments when used with execute script



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 424

def _js_comment description
  description = description ? '/* ' + description.gsub(/\s+/, ' ').strip + ' */' : ''
  description.strip + "\n"
end

#allowAnimations(web_element, value = nil) ⇒ Boolean

Determine if animation is allowed on the current underlying elements. // Turns off ng-animate animations for all elements in the <body> element(by.css(‘body’)).allowAnimations(false);

Parameters:

  • web_element (Element) —

    • the web element to act upon

  • value (Boolean) (defaults to: nil) —

    • turn on/off ng-animate animations.

Returns:

  • (Boolean) —

    whether animation is allowed.



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 489

def allowAnimations web_element, value=nil
  executeScript_ client_side_scripts.allow_animations, 'Protractor.allow_animations()', web_element, value
end

#debugger ⇒ Object

Injects client side scripts into window.clientSideScripts for debugging.

Example:

“‘ruby # inject the scripts protractor.debugger

# now that the scripts are injected, they can be used via execute_script driver.execute_script “window.clientSideScripts.getLocationAbsUrl(‘body’)” “‘

This should be used under Pry. The window client side scripts can be invoked using chrome dev tools after calling debugger.



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 476

def debugger
  executeScript_ client_side_scripts.install_in_browser, 'Protractor.debugger()'
end

#driver_get(url) ⇒ Object

Invokes the underlying driver.get. Does not wait for angular. Does not use base_url or reset_url logic.



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 172

def driver_get url
  driver.bridge.driver_get url
end

#evaluate(element, expression) ⇒ Object

Evaluate an Angular expression as if it were on the scope of the given element.

Parameters:

  • element (Element) —

    The element in whose scope to evaluate.

  • expression (String) —

    The expression to evaluate.

Returns:

  • (Object) —

    The result of the evaluation.



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 500

def evaluate element, expression
  # angular.element(element).scope().$eval(expression);
  executeScript_ client_side_scripts.evaluate, 'Protractor.evaluate()', element, expression
end

#executeAsyncScript_(script, description, *args) ⇒ Object

The same as webdriver.WebDriver.prototype.executeAsyncScript, but with a customized description for debugging.

@private
@param script [String] The javascript to execute.
@param description [String]  A description of the command for debugging.
@param args [var_args] The arguments to pass to the script.
@return The scripts return value.



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 438

def executeAsyncScript_ script, description, *args
  # add description as comment to script so it shows up in server logs
  script = _js_comment(description) + script

  driver.execute_async_script script, *args
end

#executeScript_(script, description, *args) ⇒ Object

The same as webdriver.WebDriver.prototype.executeScript,

but with a customized description for debugging.

@private
@param script [String] The javascript to execute.
@param description [String]  A description of the command for debugging.
@param args [var_args] The arguments to pass to the script.
@return The scripts return value.



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 454

def executeScript_ script, description, *args
  # add description as comment to script so it shows up in server logs
  script = _js_comment(description) + script

  driver.execute_script script, *args
end

#finder?(finder_name) ⇒ boolean

Return true if given finder is a protractor finder.

Parameters:

  • finder_name (Symbol|String) —

    the name of the finder

Returns:

  • (boolean) 


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# File 'lib/angular_webdriver/protractor/protractor.rb', line 22

def finder? finder_name
  NEW_FINDERS_KEYS.include? finder_name.intern
end

#get(destination, opt_timeout = driver.max_page_wait_seconds) ⇒ Object

@see webdriver.WebDriver.get

Navigate to the given destination. Assumes that the page being loaded uses Angular.
If you need to access a page which does not have Angular on load,
use driver_get.

@example
browser.get('https://angularjs.org/');
expect(browser.getCurrentUrl()).toBe('https://angularjs.org/');

Parameters:

  • destination (String) —

    The destination URL to load, can be relative if base_url is set

  • opt_timeout (Integer) (defaults to: driver.max_page_wait_seconds) —

    Number of seconds to wait for Angular to start. Default 30



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 108

def get destination, opt_timeout=driver.max_page_wait_seconds
  # do not use driver.get because that redirects to this method
  # instead driver_get is provided.

  timeout = opt_timeout

  raise "Invalid timeout #{timeout}" unless timeout.is_a?(Numeric)

  unless destination.is_a?(String) || destination.is_a?(URI)
    raise "Invalid destination #{destination}"
  end

  # http://about:blank doesn't work. it must be exactly about:blank
  about_url = destination.start_with?('about:')

  # data urls must be preserved and not have http:// prepended.
  # data:<blah>
  data_url  = destination.start_with?('data:')

  unless about_url || data_url
    # URI.join doesn't allow for http://localhost:8081/#/ as a base_url
    # so this departs from the Protractor behavior and favors File.join instead.
    #
    # In protractor: url.resolve('http://localhost:8081/#/', 'async')
    #                => http://localhost:8081/async
    # In Ruby:       File.join('http://localhost:8081/#/', 'async')
    #                => http://localhost:8081/#/async
    #
    base_url_exists = base_url && !base_url.empty?
    tmp_uri = URI.parse(destination) rescue URI.parse('')
    relative_url = !tmp_uri.scheme || !tmp_uri.host

    if base_url_exists && relative_url
      destination = File.join(base_url, destination.to_s)
    elsif relative_url # prepend 'http://' to urls such as localhost
      destination = "http://#{destination}"
    end
  end

  msg = lambda { |str| 'Protractor.get(' + destination + ') - ' + str }

  return driver_get(destination) if ignore_sync

  driver_get(reset_url)
  executeScript_(
    'window.location.replace("' + destination + '");',
    msg.call('reset url'))

  wait(timeout) do
    url                  = executeScript_('return window.location.href;', msg.call('get url'))
    not_on_reset_url     = url != reset_url
    destination_is_reset = destination == reset_url
    raise 'still on reset url' unless not_on_reset_url || destination_is_reset
  end

  # now that the url has changed, make sure Angular has loaded
  # note that the mock module logic is omitted.
  #
  waitForAngular description: 'Protractor.get', timeout: timeout
end

#getLocationAbsUrl ⇒ Object

Returns the current absolute url from AngularJS.

Waits for Angular.

@example
browser.get('http://angular.github.io/protractor/#/api');
expect(browser.getLocationAbsUrl())
    .toBe('/api');



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 225

def getLocationAbsUrl
  waitForAngular
  executeScript_(client_side_scripts.get_location_abs_url,
                 'Protractor.getLocationAbsUrl()', root_element)
end

#refresh(opt_timeout) ⇒ Object

@see webdriver.WebDriver.refresh

Makes a full reload of the current page. Assumes that the page being loaded uses Angular.
If you need to access a page which does not have Angular on load, use
driver_get.

@param opt_timeout [Integer] Number of seconds to wait for Angular to start.



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 184

def refresh opt_timeout
  timeout = opt_timeout || 10

  return driver.navigate.refresh if ignore_sync

  executeScript_('return window.location.href;',
                 'Protractor.refresh() - getUrl')

  get(href, timeout)
end

#reset_url_for_browser(browser_name) ⇒ Object

IE and Safari require about:blank because they don’t work well with data urls (flaky). For other browsers, data urls are stable.

browser_name [String] the browser name from driver caps. Must be ‘safari’

or 'internet explorer'



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 346

def reset_url_for_browser browser_name
  if ['internet explorer', 'safari'].include?(browser_name)
    ABOUT_BLANK
  else
    DEFAULT_RESET_URL
  end
end

#setLocation(url) ⇒ Object

Browse to another page using in-page navigation.

Assumes that the page being loaded uses Angular.

@example
browser.get('http://angular.github.io/protractor/#/tutorial');
browser.setLocation('api');
expect(browser.getCurrentUrl())
    .toBe('http://angular.github.io/protractor/#/api');

@param url [String] In page URL using the same syntax as $location.url()



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 206

def setLocation url
  waitForAngular

  begin
    executeScript_(client_side_scripts.set_location,
                   'Protractor.setLocation()', root_element, url)
  rescue Exception => e
    raise e.class, "Error while navigating to '#{url}' : #{e}"
  end
end

#sync(webdriver_command) ⇒ Object

Syncs the webdriver command if it’s white listed

Parameters:

  • webdriver_command (Symbol) —

    the webdriver command to check for syncing



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# File 'lib/angular_webdriver/protractor/protractor.rb', line 360

def sync webdriver_command
  return unless webdriver_command
  webdriver_command = webdriver_command.intern
  # Note get must not sync here because the get command is redirected to
  # protractor.get which already has the sync logic built in.
  #
  # also don't sync set location (protractor custom command already waits
  # for angular). the selenium set location is for latitude/longitude/altitude
  # and that doesn't require syncing
  #
  sync_whitelist    = %i(
    getCurrentUrl
    refresh
    getPageSource
    getTitle
    findElement
    findElements
    findChildElement
    findChildElements
  )
  must_sync         = sync_whitelist.include? webdriver_command

  waitForAngular if must_sync
end

#waitForAngular(opts = {}) ⇒ WebDriver::Element, ...

Instruct webdriver to wait until Angular has finished rendering and has no outstanding $http or $timeout calls before continuing. Note that Protractor automatically applies this command before every WebDriver action.

Will wait up to driver.max_wait_seconds (set with driver.set_max_wait)

Parameters:

  • opts (Hash) (defaults to: {})

Options Hash (opts):

  • :description (String) —

    An optional description to be added to webdriver logs.

  • :timeout (Integer) —

    Amount of time in seconds to wait for angular to load. Default driver.max_wait_seconds

Returns:

  • (WebDriver::Element, Integer, Float, Boolean, NilClass, String, Array) 


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# File 'lib/angular_webdriver/protractor/protractor.rb', line 399

def waitForAngular opts={} # Protractor.prototype.waitForAngular
  return if ignore_sync

  description = opts.fetch(:description, '')
  timeout     = opts.fetch(:timeout, driver.max_wait_seconds)

  wait(timeout: timeout, bubble: true) do
    begin
      # the client side script will return a string on error
      # the string won't be raised as an error unless we explicitly do so here
      error = executeAsyncScript_(client_side_scripts.wait_for_angular,
                                  "Protractor.waitForAngular() #{description}",
                                  root_element)
      raise Selenium::WebDriver::Error::JavascriptError, error if error
    rescue Exception => e
      # https://github.com/angular/protractor/blob/master/docs/faq.md
      raise e.class, "Error while waiting for Protractor to sync with the page: #{e}"
    end
  end
end